AngularJS: ng-repeat in directive with isolated scope and $last

AngularJS: ng-repeat in directive with isolated scope and $last

I am trying to catch $last property to be notified when ng-repeat finishes
off. I've created special directive for that (ngRepeatDoneNotification).
Ng-repeat applies to another element directive (unit). So, there is a
construction with three directives:
<unit ng-repeat="unit in collection" ng-repeat-done-notification
id="{{unit.id}}"></unit>
Once I set scope to be isolated, $last disappeared in my notifier directive.
App.directive('ngRepeatDoneNotification', function() {
return function(scope, element, attrs) {
if (scope.$last){ // ISSUE IS HERE
window.alert("im the last!");
}
};
});
App.directive('unit', function() {
return {
restrict: 'E',
replace: true,
scope: {id: '@'}, // ONCE I ISOLATE SCOPE, $last DISAPPEARED
templateUrl: '/partials/unit.html',
link: function(scope, element) {}
}
});
I've create jsFiddle http://jsfiddle.net/4erLA/1/
How is it possible to catch this?